use the fallback_version option to avoid errors on source checkouts (p…

…ydata#4358)

setup.py

@@ -1,11 +1,4 @@
 #!/usr/bin/env python
 from setuptools import setup
 
-try:
-    setup(use_scm_version=True)
-except LookupError as e:
-    # .git has been removed, and this is not a package created by sdist
-    # This is the case e.g. of a remote deployment with PyCharm Professional
-    if not str(e).startswith("setuptools-scm was unable to detect version"):
-        raise
-    setup(version="999")
+setup(use_scm_version={"fallback_version": "999"})